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- Title
Field endoscopy for identifying gender, reproductive stage and gonadal anomalies in free-ranging sturgeon ( Scaphirhynchus) from the lower Mississippi River.
- Authors
Divers, S. J.; Boone, S. S.; Hoover, J. J.; Boysen, K. A.; Killgore, K. J.; Murphy, C. E.; George, S. G.; Camus, A. C.
- Abstract
Thirty-six sturgeon ( Scaphirhynchus spp.) were captured from the lower Mississippi River using baited trot-lines, anesthetized using tricaine methanesulfonate, and subjected to endoscopic evaluation of their coelom (coelioscopy) on the river bank. Using a 2.7 mm rod-lens telescope and gravity–fed sterile saline infusion, gender and reproductive stage were determined in the field, and later re-evaluted and confirmed by histology of endoscopic biopsies in the laboratory. Gender and reproductive stage were determined endoscopically in all fish without complication, and proved to correlate 100% with biopsy histology. Modern rod-lens telescopes and sterile saline insufflation can be used under field conditions, provide superior visualization of sturgeon gonads, and offer a high degree of accuracy even with inactive gonads. Rigid endoscopy is recommended as a minimally-invasive means of assessing the reproductive organs of sturgeon and other fish.
- Subjects
MISSISSIPPI River; ENDOSCOPY; GENDER; GENITALIA; STURGEONS; FISHES
- Publication
Journal of Applied Ichthyology, 2009, Vol 25, p68
- ISSN
0175-8659
- Publication type
Article
- DOI
10.1111/j.1439-0426.2009.01337.x